Soil body reinforcement device and reinforcement method for pipe jacking construction in sand soil foundation

Abstract

The invention discloses a soil body reinforcement device for pipe jacking construction in a sand soil foundation. The reinforcement device comprises a water injection pool, a water injection pump, a primary water injection guide pipe, water injection through pipes, secondary water injection guide pipes, water injection wells, water pumping wells, secondary water pumping and water collecting guide pipes, water pumping and water collecting through pipes, a primary water pumping and water collecting guide pipe, a water pumping pump and a water storage pool, wherein the water injection wells and the water pumping wells are positioned in the sand soil foundation; microorganism consolidation fluid is contained in the water injection pool; a water outlet of the water injection pool is connected with a water inlet of the water injection pump through a pipeline; a water outlet of the water injection pump is connected with a water inlet of each water injection well through a water injection pipeline assembly; a water outlet of each water pumping well is connected with a water inlet of the water pumping pump through a water pumping pipeline assembly; and a water outlet of the water pumping pump is connected with a water inlet of the water storage pool through a pipeline. A reinforcement method has the advantages that the strength stability of the sand soil foundation can be effectively improved; the operation is convenient; the influence on surrounding environment is small; the efficiency is high; and the reinforcement treatment cost of the sand soil foundation can be greatly reduced.

Description

technical field [0001] The invention relates to a soil reinforcement device and a reinforcement method for pipe jacking construction in sandy soil foundation. Background technique [0002] Pipe jacking construction has the advantages of fast construction speed, high precision and low cost, and is widely used in the construction and laying of water supply, gas, electric power, telecommunications, natural gas, oil and other pipelines. For pipe jacking construction in sandy soil foundation, due to the large pores between sand particles, the drilling fluid cannot effectively form a protective filter cake layer on the inner wall of the borehole, making the borehole very prone to collapse, and then Blocking of jacking pipes under construction. In order to improve the strength and stability of boreholes in pipe jacking construction, it is an effective technical means to strengthen the sand foundation. At present, the reinforcement methods for sandy soil foundation mainly include ...

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Problems solved by technology

At present, the reinforcement methods for sandy soil foundation mainly include replacement cushion method, vibratory impact method, cement-soil mixing method and cement-soil fly ash gravel pile method, but the above-mentioned methods have a great impact on the surrounding environment, and High construction cost

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